Can be checked by injector operating sound and engine speed changes to determine:

When the engine is running, contact the injector with your fingers and should have the feeling of pulse vibration.

With a screwdriver (commonly known as a screwdriver) or stethoscope with the injector, should be able to hear its rhythmic work sound.Otherwise, it indicates that the injector is not working properly and should be further checked by the fuel injection signal output from the injector or the electronic control unit .

Off (oil) cylinder detection

In the use of oil off inspection method, if unplugged a cylinder injector harness plug, stop the fuel injection, the engine speed immediately decreased, indicating that the injector is working properly;Otherwise it does not work or work badly, should be further checked.

If you unplug a cylinder injector harness plug, exhaust pipe to stop smoking, then the cylinder injector card can not be closed.

ii. Check the electromagnetic resistance of injector

Unplug the injector harness connector and check the resistance between the terminals with a multimeter. For resistors at 20 ° C, the resistance should be 12Ω to 16Ω for low resistance injectors. For low resistance injectors , The resistance should be 2Ω to 5Ω, otherwise, should be replaced.

Remove the check the injector harness connector, with a multimeter measurement resistor electromagnetic coil, and its value should be 2Ω to 3Ω or 4Ω to 5 Ω, or should be replaced injector.

(2) cold start injector inspection

i. cold start injector leak check

Connect the cold start injector to the oil filter outlet port, and then use the wire to short the two detection jacks of the electric gasoline pump and turn on the ignition switch to operate the petrol pump. At this time the injector should be free of leakage or leakage in 1min no more than 1 drop, or should be cleaned or replaced.

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